To sleep for 8 hours every day is very necessary for us.(改为同义句)It's ___ ___ ___ we ___ for 8 hours every day.

是it's necessary for us to sleep for 8 hours 还是is' necessary for us to sleep 8 hours? To sleep for 8 hours every day is very necessary for us.(改为同义句)It's ___ ___ ___ we ___ for 8 hours every day. sleep for 20 hours sleep 20 hours 哪一个更正确 We need to sleep for at least 8 hours every day.（划线提问） ___ ___ ___we ___ to sleep every day? Babies sleep for up to eighteen hours a day.People have no idea how important sleep is to their lives. He has ( )for two hours.a.gone to sleep b.got to sleep c.been asleep d.fallen asleep. I think it's important for us ____(sleep) eight hours a night.为什么填to sleep? I sleep for nine hours every night The baby _____(sleep) for two hours it is n_ for you to sleep eight hours every day. He has been______(sleep)for two hours since he went to bed.请说明理由 It's not_____(usual) for a student to sleep only 5 hours every night go to sleep for How many hours do you sleep every night?回答about 8 hours 前面能加for吗 I think is necessary for us to sleep for eight hours everyday.同义句I think __ __ for us to sleep for eight hours everyday.漏掉了，是 I think it is necessary for us to sleep for eight hours everyday.同义句 i sleep for eight hours.中的for必须用吗? _________ necessary for students ________ sleep eight hours every night I____(sleep)for only 3 hours last night